whyzee
11-14-2011, 04:14 PM
Decided to add a new K&N air filter and rejet. For fun I decided to remove the air box lid also. I have pretty good knowledge about jetting but being new to the 400ex motor I did some research about where to start. So I started with a 155 main stock needle clip etc.
Ran great. Tremendous power increase. Being afraid of running lean I immediatly went to a 160. Ran awesome. Again ran great, actually could almost pull 3rd gear out of my corners.
so I went up and up.....all the way to 185!!!! Finally started to feel the motor choking a litter.
Went down to a 180 main, runs incredible. The power increase over stock is so much that I am afraid it is too much for my motor. I do not want to blow it up.
anyone else wind up with jetting similar to this?
Stock exhaust by the way. Air temp was 55 sea level elevation.
Thanks
Ran great. Tremendous power increase. Being afraid of running lean I immediatly went to a 160. Ran awesome. Again ran great, actually could almost pull 3rd gear out of my corners.
so I went up and up.....all the way to 185!!!! Finally started to feel the motor choking a litter.
Went down to a 180 main, runs incredible. The power increase over stock is so much that I am afraid it is too much for my motor. I do not want to blow it up.
anyone else wind up with jetting similar to this?
Stock exhaust by the way. Air temp was 55 sea level elevation.
Thanks